A high enthalpy compressor test method capable of realizing strong precooling

Abstract

A high-enthalpy compressor test method capable of realizing strong precooling mainly comprises a valve, a filter, a pressure stabilizing valve, a flow meter, an exhaust valve, a back pressure regulating valve, a turbine, a compressor, a combustion chamber, a liquid fuel pipeline, a gaseous fuel pipeline, a lubricating oil pipeline, a precooler and a compressor test section. The combustion chamber is provided with a liquid fuel inlet and a gaseous fuel inlet, and supports multiple inlets. The high-enthalpy gas generated by the combustion chamber directly enters the compressor test section, and the experimental test of the high-enthalpy compressor can be realized. The precooler is arranged at the outlet of the combustion chamber, the high-enthalpy gas generated by the combustion chamber is cooled, the experimental test of the precooler can be realized, and the compressor test section is arranged after the precooler, and the experimental test of the influence of the precooler on the compressor can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressor testing, in particular to a high-enthalpy compressor testing method capable of realizing strong pre-cooling. BACKGROUND

[0002] Hypersonic vehicles play an important role in current military and civil aviation fields, and research on hypersonic vehicle components, ground high-enthalpy condition experimental testing, and pre-cooler research are of great importance. Current wind tunnel testing technology for high-total-temperature and high-total-pressure test airflows is increasingly mature, mainly involving heating of incoming airflow, but requires special high-cost production of high-enthalpy airflows, such as plasma, electric arc, shock wave, and fuel combustion heat. These heating devices require harsh working environments, and safety, economy, and maintainability need to be further improved. SUMMARY

[0003] The present application aims to solve the above problems in the prior art, and provides a high-enthalpy compressor testing method capable of realizing strong pre-cooling. The high-enthalpy airflow generated by the combustion chamber is used for experimental testing of the high-enthalpy compressor, a pre-cooler is arranged at the outlet of the combustion chamber to cool the high-enthalpy gas generated by the combustion chamber, experimental testing of the pre-cooler is realized, and a compressor testing section is arranged after the pre-cooler to realize experimental testing of the influence of the pre-cooler on the compressor.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A high-enthalpy compressor testing method capable of realizing strong pre-cooling, under main working conditions, the compressor at the air inlet of the main air path works, the high-pressure gas enters the filter, the filtered air passes through the pressure stabilizing valve and the flow meter and is divided into multiple paths to enter the combustion chamber, and the liquid fuel and gaseous fuel enter the combustion chamber through the liquid fuel pipeline and the gaseous fuel pipeline to start combustion; the high-enthalpy gas generated by the combustion chamber enters the compressor testing section for testing; or a pre-cooler is added after the combustion chamber to cool the high-enthalpy gas, realize experimental measurement of the pre-cooler, and the pre-cooled high-enthalpy gas continues to enter the compressor testing section for experimental testing of the influence of the pre-cooler on the compressor; the gas after the compressor testing drives the turbine to operate, and then is discharged; the compressor, as a power consumer, is driven by the turbine to suck air into the pipeline, and then is discharged through the compressor exhaust port;

[0006] Under self-circulation working conditions, the gas after the compressor testing drives the turbine, the turbine drives the compressor to operate and do work, air is sucked into the pipeline, and then enters the filter through the valve after passing through the back pressure regulating valve and the flow meter, the filtered air is divided into multiple paths to enter the combustion chamber after passing through the pressure stabilizing valve and the flow meter, and the generated high-enthalpy gas continues to drive the turbine.

[0007] The device used in the test method of the present invention includes a filter, a pressure regulating valve, a flow meter, a combustion chamber, a turbine, a compressor, a back pressure regulating valve, a flow meter, an exhaust valve, a precooler and a compressor test section;

[0008] The main air inlet is provided with a valve and is connected to the filter through a pipe. A pressure-stabilizing valve is arranged behind the filter and a flow meter is connected in series through the pipe, and then the combustion chamber is connected by multiple pipes. The combustion chamber is also provided with a liquid fuel pipe and a gaseous fuel pipe. A precooler is provided at the outlet of the combustion chamber, and a compressor test section is provided behind the precooler, and then it is connected to the turbine through a pipe. A pipe is connected to one side of the turbine to discharge exhaust gas. A compressor is arranged on the other side of the turbine. One side of the compressor is a bypass air inlet, and the other side of the compressor is connected to the back pressure regulating valve through a pipe. A flow meter and an exhaust valve are arranged in sequence after the back pressure regulating valve. A valve is also provided between the exhaust valve and the filter, and the valve is connected to the filter through a pipe.

[0009] The present invention also includes a lubricating oil system and a lubricating oil pipeline. The lubricating oil system introduces oil into the bearings of the turbine and the compressor rotor through the lubricating oil pipeline to provide lubrication for them.

[0010] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0011] 1. The test method of the present invention sets a compressor test section at the combustion chamber outlet, and uses the high enthalpy gas generated in the combustion chamber for experimental testing of the high enthalpy compressor.

[0012] 2. The test method of the present invention adds a precooler and a compressor test section to cool the high-enthalpy gas generated in the combustion chamber for experimental testing of the precooler and experimental testing of the impact on the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0014] Figure 2 This is a test diagram of the high enthalpy compressor of the present invention;

[0015] Figure 3 This is a test diagram of the impact of the precooler on the compressor of the present invention. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, the device structure used in the testing method of the present invention is as follows:

[0018] Valve 1 is connected with filter 3 through pipe 2, pressure stabilizing valve 4 is arranged behind filter 3 and flowmeter 6 is connected in series through pipe 5, then multi-pipe is connected with combustion chamber 8, combustion chamber 8 is also provided with liquid fuel pipe 7 and gaseous fuel pipe 19, pre-cooler 9 is arranged at the outlet of combustion chamber 8, compressor test section 10 is arranged behind pre-cooler 9, then turbine 15 is connected through pipe 12, one side of turbine is connected with pipe 14 to discharge exhaust gas, compressor 16 is arranged at the other side of turbine, one side of compressor is bypass air inlet, the other side of compressor is connected with back pressure regulating valve 18 through pipe, back pressure regulating valve 18 is arranged behind flowmeter 21, exhaust valve 22 is arranged between flowmeter 21 and valve 23, finally valve 23 is connected with filter 3 through pipe 24. Lubricating oil system 11 guides lubricating oil to the bearing of rotor of turbine and compressor through lubricating oil pipe 13 to provide lubrication.

[0019] Referring to Figures 2-3 , the test method of the application is as follows:

[0020] Under main working condition: valve 1 is opened, valve 23 is closed, and exhaust valve 22 is opened.

[0021] The compressor at bypass air inlet starts to work, and high pressure gas enters filter 3 through pipe 2 to filter impurities in air.

[0022] The filtered air enters pipe 5, and pressure stabilizing valve 4 and flowmeter 6 are used to ensure the pressure and flow in pipe, then the air is divided into multiple paths to enter combustion chamber 8 to meet the combustion characteristics of different fuels and ensure the full combustion of fuel in combustion chamber.

[0023] At the same time, liquid fuel and gaseous fuel enter combustion chamber 8 through liquid fuel pipe 7 and gaseous fuel pipe 19 to start combustion.

[0024] Referring to Figure 2 , the high enthalpy gas generated by combustion chamber 8 does not pass through pre-cooling but enters compressor test section 10, and high enthalpy compressor is used in compressor test section 10 to adapt to the condition of high enthalpy gas. In this test method, pre-cooler can be closed or not assembled.

[0025] Referring to Figure 3 , pre-cooler 9 is added behind combustion chamber 8 to cool high enthalpy gas, realize pre-cooler experimental measurement, and the pre-cooled high enthalpy gas continues to enter compressor test section 10 to test the influence of pre-cooler on compressor.

[0026] The tested gas after the compressor passes through the pipe 12, drives the turbine 15 to operate, and then is discharged through the pipe 14. The valve 1 is always in the open state, the valve 23 is in the closed state, and the exhaust valve 22 is in the open state. The compressor 16 is driven by the turbine 15 as a power consumer, sucks air into the pipe 17, and then discharges the air through the exhaust port of the compressor 16.

[0027] In the self-circulation working condition: when the valve 1 is closed, the valve 23 is opened, and the exhaust valve 22 is closed. The tested gas drives the turbine 15, and the turbine 15 drives the compressor 16 to operate and work, sucks air into the pipe 17, and then enters the pipe 20. The back pressure regulating valve 18 and the flowmeter 21 are used to maintain the pipeline pressure and adjust the air flow. The air enters the pipe 24 through the valve 23, the impurities in the air are filtered by the filter 3, the filtered air enters the pipe 5, the pressure and flow in the pipe are ensured by the pressure stabilizing valve 4 and the flowmeter 6, and then the air is divided into multiple paths to enter the combustion chamber. The high-enthalpy gas generated continues to drive the turbine.

Claims

1. A high-enthalpy compressor testing method capable of achieving strong pre-cooling, characterized by: Under the main operating condition, the compressor at the main air inlet is working, and the high-pressure gas enters the filter. The filtered air passes through the pressure regulating valve and the flow meter and is divided into multiple paths to enter the combustion chamber. At the same time, the liquid fuel and the gaseous fuel enter the combustion chamber through the liquid fuel pipeline and the gaseous fuel pipeline to start combustion. The high-enthalpy gas generated in the combustion chamber enters the compressor test section for testing without pre-cooling, or a pre-cooler is added after the combustion chamber to cool the high-enthalpy gas to realize the experimental measurement of the pre-cooler. The pre-cooled high-enthalpy gas continues to enter the compressor test section for experimental testing of the influence of the pre-cooler on the compressor. The gas after the compressor test drives the turbine to operate and is then discharged. The compressor, as a power-consuming part, is driven by the turbine, sucking air into the pipeline and then discharging it through the compressor exhaust port; Under the self-circulating condition, the gas tested by the compressor drives the turbine, and the turbine drives the compressor to operate and work, sucking air into the pipeline, and then passing through the back pressure regulating valve and flow meter and entering the filter through the valve. The filtered air passes through the pressure stabilizing valve and flow meter and is divided into multiple paths to enter the combustion chamber. The high-enthalpy gas generated continues to drive the turbine.

2. A high-enthalpy compressor testing method capable of achieving strong pre-cooling according to claim 1, characterized in that: The apparatus used in the test method includes a filter, a pressure regulating valve, a first flow meter, a combustion chamber, a turbine, a compressor, a back pressure regulating valve, a second flow meter, an exhaust valve, a precooler, and a compressor test section; The main air inlet is provided with a valve and is connected to the filter through a pipeline. A pressure-stabilizing valve is arranged behind the filter and is connected in series with a first flow meter through a pipeline, and is then connected to the combustion chamber by multiple pipelines. The combustion chamber is also provided with a liquid fuel pipeline and a gaseous fuel pipeline. A precooler is provided at the outlet of the combustion chamber, and a compressor test section is provided behind the precooler, and is then connected to the turbine through a pipeline. A pipeline is connected to one side of the turbine to discharge exhaust gas. A compressor is arranged on the other side of the turbine. One side of the compressor is a bypass air inlet, and the other side of the compressor is connected to a back pressure regulating valve through a pipeline. A second flow meter and an exhaust valve are arranged in sequence behind the back pressure regulating valve. A valve is also provided between the exhaust valve and the filter, and the valve is connected to the filter through a pipeline.

3. A high-enthalpy compressor testing method capable of achieving strong pre-cooling according to claim 2, characterized in that: It also includes a lubricating oil system and lubricating oil pipelines. The lubricating oil system introduces oil into the bearings of the rotors on the turbine and compressor through the lubricating oil pipelines to provide lubrication for them.

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